An injection mould comprises first and second relatively movable mould halves defining at least one mould cavity between them, a first of the halves having a sprue through which moulding material is injected, a runner leading from the sprue to at least one gate into the or each mould cavity. The mould is characterised in that, when the mould halves are engaged one with the other, an insert projects from one mould half into a corresponding recess in the other mould half at a position corresponding to the or each gate into the mould cavity, the insert having a cutting groove extending therealong opening into an end face of the insert, the end face being in communication with the sprue and the opposite end of the groove being in communication with the gate, the groove thereby constituting at least a part of the runner, the groove extending at an acute angle to the relative direction of movement of the mould halves whereby, as the mould halves are separated, a cutting edge of the groove travels across the gate to shear the material in the gate.

A sprue system for a nozzle-side injection-molding arrangement of an injection-molding machine for introducing a plasticizable and/or plasticized plastics material into an injection-molding tool along a runner, the center axis of which fixes an injection axis, includes a sprue piece which at least partially forms the runner, a tube portion and a flange portion. A fastener assembly for fastening the sprue system to the injection-molding tool and for aligning the sprue piece along the injection axis is included. The sprue piece and the fastener assembly are formed adjustably in relation to one another and the sprue system has an adjuster for setting a distance (A) between the flange portion and the fastener assembly.

An injection mold includes an upper mold core, an upper mold plate, a sprue bushing and an upper mold fixing plate. The sprue bushing is completely accommodated in the upper mold plate and the upper mold core, the sprue bushing defining a runner therein. The sprue bushing includes a mounting part and an extending part extending from the mounting part, the mounting part is received in the upper mold plate, the extending part is disposed through the upper mold core, and the runner runs through the mounting part and the extending part. The upper mold fixing plate is piled on and fixed to the upper mold plate, the upper mold fixing plate is provided with a through hole communicated with the runner, the upper mold fixing plate includes a flange extending inwardly from a side wall of the through hole, the flange abuts against the mounting part.

An injection mould comprises first and second relatively movable mould halves defining at least one mould cavity between them, a first of the halves having a sprue through which moulding material is injected, a runner leading from the sprue to at least one gate into the or each mould cavity. The mould is characterised in that, when the mould halves are engaged one with the other, an insert projects from one mould half into a corresponding recess in the other mould half at a position corresponding to the or each gate into the mould cavity, the insert having a cutting groove extending therealong opening into an end face of the insert, the end face being in communication with the sprue and the opposite end of the groove being in communication with the gate, the groove thereby constituting at least a part of the runner, the groove extending at an acute angle to the relative direction of movement of the mould halves whereby, as the mould halves are separated, a cutting edge of the groove travels across the gate to shear the material in the gate.

The present invention concerns an adaptor plate for connecting a cover plate to a plurality of piston housings of an injection molding machine, wherein the adaptor plate has a first fluid passage and a second fluid passage for feeding a first and a second control fluid into the piston housings, wherein the first fluid passage has at least one first fluid passage inlet for receiving the first control fluid and a plurality of first fluid passage outlets for discharge of the first control fluid to the piston housings and the second fluid passage has at least one second fluid passage inlet for receiving the second control fluid and a plurality of second fluid passage outlets for discharge of the second control fluid to the piston housings.

The invention relates to an injection molding tool having a nozzle plate which comprises a first through-hole in an axial direction, in which first through-hole an injection molding nozzle is arranged extending in the axial direction. The injection molding tool further includes a cavity plate which comprises at least one cavity half into which a second through-hole, which is arranged in the cavity plate and coaxially with respect to the first through-hole, opens. A nozzle bushing, which encloses the injection molding nozzle at least in certain regions in the assembled state, is arranged in the second through-hole. The nozzle bushing is operatively connected to the cavity plate and/or nozzle plate by way of an operative connection means, wherein the nozzle bushing and the operative connection means are operatively connected to one another at least in the axial direction.

A sprue system for a nozzle-side injection-molding arrangement of an injection-molding machine for introducing a plasticizable and/or plasticized plastics material into an injection-molding tool along a runner, the center axis of which fixes an injection axis, includes a sprue piece which at least partially forms the runner, a tube portion and a flange portion. A fastener assembly for fastening the sprue system to the injection-molding tool and for aligning the sprue piece along the injection axis is included. The sprue piece and the fastener assembly are formed adjustably in relation to one another and the sprue system has an adjuster for setting a distance (A) between the flange portion and the fastener assembly.

An injection mold includes an upper mold core, an upper mold plate, a sprue bushing and an upper mold fixing plate. The sprue bushing is completely accommodated in the upper mold plate and the upper mold core, the sprue bushing defining a runner therein. The sprue bushing includes a mounting part and an extending part extending from the mounting part, the mounting part is received in the upper mold plate, the extending part is disposed through the upper mold core, and the runner runs through the mounting part and the extending part. The upper mold fixing plate is piled on and fixed to the upper mold plate, the upper mold fixing plate is provided with a through hole communicated with the runner, the upper mold fixing plate includes a flange extending inwardly from a side wall of the through hole, the flange abuts against the mounting part.

The present invention concerns an adaptor plate for connecting a cover plate to a plurality of piston housings of an injection molding machine, wherein the adaptor plate has a first fluid passage and a second fluid passage for feeding a first and a second control fluid into the piston housings, wherein the first fluid passage has at least one first fluid passage inlet for receiving the first control fluid and a plurality of first fluid passage outlets for discharge of the first control fluid to the piston housings and the second fluid passage has at least one second fluid passage inlet for receiving the second control fluid and a plurality of second fluid passage outlets for discharge of the second control fluid to the piston housings.

A hot-runner mold gate structure includes a body having a path, and a room is defined in one end of the path. A guide member is inserted in a bushing, and both of which are located in the room. A locking member is connected to the room and has a reception area in one end of the locking member. The guide member has an axial guide slot and a guide hole. The guide member has a tip which protrudes through an outlet in the distal end of the bushing. Melted PET passes through the guide hole, the guide slot and the gap between the tip and the inside of the outlet to enter into the mold set. The contact area between the locking member and the bushing is minimized to maintain a certain temperature at the outlet of the bushing to avoid the PET from being cooled.